Math & Science ⇒ Equations aligned at equal Sign

[financialwar]

I want the equations to be aligned at the equal signs. This is my attempt, I also tried with {eqnarray}, can't get the equal sign to line up.

Code: Select all

\begin{align*}
  interest = PV (r \times t)\\
           = 8000 \left(0.06\times \frac{128}{365}\right)\\
           = \$ 168.32
\end{align*}

[localghost]

Code: Select all

\begin{align*}
  interest &= PV (r \times t)\\
           &= 8000 \left(0.06\times \frac{128}{365}\right)\\
           &= \$ 168.32
\end{align*}

Further reading:

• The amsmath manual.
• The »Math Mode« document.
• »Similar Topics« at the bottom of the page (only when logged in).

Thorsten

[financialwar]

still don't align, just read the guide, don't you have to put & before and after the = sign?

[localghost]

still don't align, just read the guide, don't you have to put & before and after the = sign?

Could you please be a bit more specific and describe the problem in more than just one line? A code example would be helpful.

The align environment only needs with one single alignment character (»&«) in this case. In most cases it is placed right before the equal sign. The provided code should work. If not, kindly provide a counter example.

[financialwar]

Sorry, my mistake. Got mixed up with {eqnarray}.

[localghost]

[…] Got mixed up with {eqnarray}.

Avoid eqnarray!

[financialwar]

yea, Sir!